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Fair Value Schedule of Impaired Financing Receivables (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |  |
Book Value Of Impaired Loans Carried At Fair Value | $ 3,577 | $ 6,379 |
Partial Charge-Offs On Impaired Loans carried at Fair Value | 2,780 | 3,681 |
Impaired Financing Receivable, Related Allowance | 684 | 548 |
Impaired loans carried at fair value | 3,574 | 5,983 |
Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment | 52,987 | 64,047 |
Partial Charge-offs on Impaired Loans carried at Cost | 7,260 | 21,262 |
impaired Financing Receivable, loans not held at Fair Value, Carrying Amount | 52,306 | 63,895 |
Recorded investment | 56,564 | 70,426 | $ 80,664
Partial charge-offs on impaired loans | 10,040 | 24,943 |
Individually evaluated for impairment | 684 | 548 |
Impaired Financing Receivable, Carrying Value | 55,880 | 69,878 |
Financing Receivable, not collateral dependent [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | 681 | 152 |
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Related Allowance | $ 3 | $ 396 |

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- Definition Impaired Financing Receivable, loans not held at Fair Value, Recorded Investment + References No definition available. + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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